v4.0/src/TOOLS/BLD/INC/BIOS.H

   1 /***
   2 *bios.h - declarations for bios interface functions and supporting definitions
   3 *
   4 *   Copyright (c) 1987-1988, Microsoft Corporation.  All rights reserved.
   5 *
   6 *Purpose:
   7 *   This file declares the constants, structures, and functions
   8 *   used for accessing and using various BIOS interfaces.
   9 *
  10 *******************************************************************************/
  11
  12
  13 #ifndef NO_EXT_KEYS /* extensions enabled */
  14     #define _CDECL  cdecl
  15 #else   /* extensions not enabled */
  16     #define _CDECL
  17 #endif  /* NO_EXT_KEYS */
  18
  19 /* manifest constants for BIOS serial communications (RS-232) support */
  20
  21 /* serial port services */
  22
  23 #define _COM_INIT       0   /* init serial port */
  24 #define _COM_SEND       1   /* send character */
  25 #define _COM_RECEIVE    2   /* receive character */
  26 #define _COM_STATUS     3   /* get serial port status */
  27
  28 /* serial port initializers.  One and only one constant from each of the
  29  * following four groups - character size, stop bit, parity, and baud rate -
  30  * must be specified in the initialization byte.
  31  */
  32
  33 /* character size initializers */
  34
  35 #define _COM_CHR7       2   /* 7 bits characters */
  36 #define _COM_CHR8       3   /* 8 bits characters */
  37
  38 /* stop bit values - on or off */
  39
  40 #define _COM_STOP1      0   /* 1 stop bit */
  41 #define _COM_STOP2      4   /* 2 stop bits */
  42
  43 /*  parity initializers */
  44
  45 #define _COM_NOPARITY   0   /* no parity */
  46 #define _COM_ODDPARITY  8   /* odd parity */
  47 #define _COM_EVENPARITY 24  /* even parity */
  48
  49 /*  baud rate initializers */
  50
  51 #define _COM_110        0       /* 110 baud */
  52 #define _COM_150        32      /* 150 baud */
  53 #define _COM_300        64      /* 300 baud */
  54 #define _COM_600        96      /* 600 baud */
  55 #define _COM_1200       128     /* 1200 baud */
  56 #define _COM_2400       160     /* 2400 baud */
  57 #define _COM_4800       192     /* 4800 baud */
  58 #define _COM_9600       224     /* 9600 baud */
  59
  60
  61 /* manifest constants for BIOS disk support */
  62
  63 /* disk services */
  64
  65 #define _DISK_RESET     0   /* reset disk controller */
  66 #define _DISK_STATUS    1   /* get disk status */
  67 #define _DISK_READ      2   /* read disk sectors */
  68 #define _DISK_WRITE     3   /* write disk sectors */
  69 #define _DISK_VERIFY    4   /* verify disk sectors */
  70 #define _DISK_FORMAT    5   /* format disk track */
  71
  72 /* struct used to send/receive information to/from the BIOS disk services */
  73
  74 #ifndef NO_EXT_KEYS     /* extensions must be enabled */
  75
  76 #ifndef _DISKINFO_T_DEFINED
  77
  78 struct diskinfo_t {
  79     unsigned drive;
  80     unsigned head;
  81     unsigned track;
  82     unsigned sector;
  83     unsigned nsectors;
  84     void far *buffer;
  85     };
  86
  87 #define _DISKINFO_T_DEFINED
  88
  89 #endif
  90
  91 #endif /* NO_EXT_KEYS */
  92
  93
  94 /* manifest constants for BIOS keyboard support */
  95
  96 /* keyboard services */
  97
  98 #define _KEYBRD_READ        0   /* read next character from keyboard */
  99 #define _KEYBRD_READY       1   /* check for keystroke */
 100 #define _KEYBRD_SHIFTSTATUS 2   /* get current shift key status */
 101
 102
 103 /* manifest constants for BIOS printer support */
 104
 105 /* printer services */
 106
 107 #define _PRINTER_WRITE  0   /* write character to printer */
 108 #define _PRINTER_INIT   1   /* intialize printer */
 109 #define _PRINTER_STATUS 2   /* get printer status */
 110
 111
 112 /* manifest constants for BIOS time of day support */
 113
 114 /* time of day services */
 115
 116 #define _TIME_GETCLOCK  0   /* get current clock count */
 117 #define _TIME_SETCLOCK  1   /* set current clock count */
 118
 119
 120 #ifndef _REGS_DEFINED
 121
 122 /* word registers */
 123
 124 struct WORDREGS {
 125     unsigned int ax;
 126     unsigned int bx;
 127     unsigned int cx;
 128     unsigned int dx;
 129     unsigned int si;
 130     unsigned int di;
 131     unsigned int cflag;
 132     };
 133
 134 /* byte registers */
 135
 136 struct BYTEREGS {
 137     unsigned char al, ah;
 138     unsigned char bl, bh;
 139     unsigned char cl, ch;
 140     unsigned char dl, dh;
 141     };
 142
 143 /* general purpose registers union -
 144  *  overlays the corresponding word and byte registers.
 145  */
 146
 147 union REGS {
 148     struct WORDREGS x;
 149     struct BYTEREGS h;
 150     };
 151
 152 /* segment registers */
 153
 154 struct SREGS {
 155     unsigned int es;
 156     unsigned int cs;
 157     unsigned int ss;
 158     unsigned int ds;
 159     };
 160
 161 #define _REGS_DEFINED
 162
 163 #endif /* _REGS_DEFINED */
 164
 165
 166 /* function prototypes */
 167
 168 unsigned _CDECL _bios_equiplist(void);
 169 unsigned _CDECL _bios_keybrd(unsigned);
 170 unsigned _CDECL _bios_memsize(void);
 171 unsigned _CDECL _bios_printer(unsigned, unsigned, unsigned);
 172 unsigned _CDECL _bios_serialcom(unsigned, unsigned, unsigned);
 173 unsigned _CDECL _bios_timeofday(unsigned, long *);
 174 int _CDECL int86(int, union REGS *, union REGS *);
 175 int _CDECL int86x(int, union REGS *, union REGS *, struct SREGS *);
 176
 177 #ifndef NO_EXT_KEYS     /* extensions must be enabled */
 178
 179 unsigned _CDECL _bios_disk(unsigned, struct diskinfo_t *);
 180
 181 #endif /* NO_EXT_KEYS */